If the document is using fonts that are not embedded and are not installed on client machine the text is not displayed.
 

To reproduce: 
1. Drag and drop RadPdfViewer and RadPdfViewerNavigator
2. Load attached file from ticket
3. Click PrintPreview button from navigator and you will see that NullRefference exception is thrown. 

Workaround: 
You can set the ShowPrintPreview property to false of RadPrintViewNavigator
this.radPdfViewerNavigator1.ShowPrintPreview = false;

NullReferenceException when the document annotations are imported.

Download the attached pdf document and open it with RadPDfViewer and Adobe Reader. You will see that our viewer renders it with the black and white colors inverted.

To reproduce:
1.Load a document
2.Click the print button on the RadPdfViewerNavigator

Please refer to the attached gif file. The sample pdf file is attached as well.

Open large file in RadPDFViewer. Navigate from page 70 to page 250 or enter number by hand and you will notice that the page is opened slowly.

Loading a page with large images (e.g. 2 JPEG images 2500x3500 each) takes a lot of time. The majority of the time is spent in decoding the images.

"Ñ" symbol is either rendered as a square, or it is not rendered at all.

Include Marquee Zoom as tool.

Include support for layers

1. Load file which is signed with digital signature
2. Scroll to the end of document - you will see that the signature is not visible.